R help - Apr 1999 - legend()

In legend() is it possibly to mix lines and boxes?  I would like to do
something like 

  legend(locator(1), legend = c("al", "ben",
"chris", "dave"), lty     c(1, 2, 3, NA), fill = c(NA, NA,
NA, "gray"))

to indicate that "al", "ben" and "chris" have
lines, and "dave" has a gray
shading.

Many thanks, Jonathan.

Jonathan Rougier                       Science Laboratories
Department of Mathematical Sciences    South Road
University of Durham                   Durham DH1 3LE

"[B]egin upon the precept ... that the things we see are to be 
 weighed in the scale with what we know"  (Meredith, 1879, The Egoist)

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>>>>> "JonR" == Jonathan Rougier <J.C.Rougier at
durham.ac.uk> writes:
    JonR> In legend() is it possibly to mix lines and boxes?  I would like
    JonR> to do something like

    JonR>   legend(locator(1), legend = c("al", "ben",
"chris", "dave"),
    JonR> lty = c(1, 2, 3, NA), fill = c(NA, NA, NA, "gray"))

    JonR> to indicate that "al", "ben" and
"chris" have lines, and "dave"
    JonR> has a gray shading.

Not quite, currently.

1) the fill colors currently must be integer (indexing into palette()).

2) Currently, either you get no or all boxes, <<--- to be improved by
volunteer!
   since the 'fill' argument is only treated as scalar.
   Whereas this is easy to extend,
   much nicer (and more tedious) would be to NOT use "space" for a
non-box
   and to NOT use space when there's no line

   (you probably understand what I mean, when looking at the following example).

Something *like* the above is possible with, e.g.,

	  plot(1)
	  legend(1,1, legend = c("al", "ben", "chris",
"dave"),
	         lty = c(1, 2, 3, -1), fill = c(NA, NA, NA, 3))

Martin
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